system service

/*
 * Сделано в SharpDevelop.
 * Пользователь: Андрей Михайлович
 * Дата: 18.03.2015
 * Время: 10:11
 *
 * Для изменения этого шаблона используйте Сервис | Настройка | Кодирование | Правка стандартных заголовков.
 */
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.ServiceProcess;
using System.Text;
using Microsoft.Win32;

namespace scrblckService
{
    public class scrblckService : ServiceBase
    {
        public const string MyServiceName = "scrblckService";

        public scrblckService()
        {
            InitializeComponent();
        }

        void SystemEvents_SessionSwitch(object sender, Microsoft.Win32.SessionSwitchEventArgs e)
        {
            Microsoft.Win32.SystemEvents.SessionSwitch += new Microsoft.Win32.SessionSwitchEventHandler(SystemEvents_SessionSwitch);
            if ((e.Reason == SessionSwitchReason.SessionLock) || (e.Reason == SessionSwitchReason.SessionLogoff))
            {
                //I left my desk
                Process[] proc = Process.GetProcessesByName("ScreenBlocker");
                foreach (Process prs in proc)
                {
                    prs.Kill();
                }
                Process[] proc2 = Process.GetProcessesByName("ScreenStream");
                foreach (Process prs in proc2)
                {
                    prs.Kill();
                }
            }
            else if ((e.Reason == SessionSwitchReason.SessionUnlock) || (e.Reason == SessionSwitchReason.SessionLogon))
            {
                //I returned to my desk
                Process[] proc = Process.GetProcessesByName("ScreenBlocker");
                int count = 0;
                foreach (Process prs in proc)
                {
                    count++;
                }
                if (count > 0)
                {
                    try
                    {
                        Process.Start(@"C:\Program Files\ScreenBlocker\ScreenBlocker.exe");
                    }
                    catch
                    {
                        Process.Start(@"C:\Program Files (x86)\ScreenBlocker\ScreenBlocker.exe");
                    }
                }
            }
        }

        private void InitializeComponent()
        {
            this.ServiceName = MyServiceName;
        }

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose(bool disposing)
        {
            // TODO: Add cleanup code here (if required)
            base.Dispose(disposing);
        }

        /// <summary>
        /// Start this service.
        /// </summary>
        protected override void OnStart(string[] args)
        {
            // TODO: Add start code here (if required) to start your service.
        }

        /// <summary>
        /// Stop this service.
        /// </summary>
        protected override void OnStop()
        {
            // TODO: Add tear-down code here (if required) to stop your service.
        }
    }
}